Thermal Expansion Tank Maximum Operating Pressure 150 psi Maximum Operating Temperature 200 Degrees F Outside Diameter 12.5 in Overall Height 19.2 in Pipe Size 3/4 in Tank Capacity 8.5 gal Precharge Pressure 20 psi Color White Connection Material Stainless Steel Diaphragm Material Butyl Rubber Expansion Tank Type Diaphragm For Potable Water Use Yes Manufacturer Warranty Length 1 yr Limited Market Residential Mounting Orientation Horizontal Precharged Yes